Road structure



March 1 2, 1929. s. s. Moons ROAD STRUCTURE med Aug. 27, 19z5 .NRN

Patentedjlv'lar. 12, 1929.

sereni. orifice. y

STUART B. MOORE, OF LA PORTE, TEXAS.

RGAD STRUCTURE.

Application filed August 27, 1925.

The object of my invention is a road structure which combines, to a greater eXtent than hitherto possible, the eloinontsof durability and economy.

Experiment-s with which I have been connected, showv that over 97% of vehicular traftic Will keep to adefined traclrivay-if there are ruts in the road, for instance, this percentage of traflic will lieep in them. Further experiments have convinced me that the road base must be separated from the surface by a definite line of demarcation in order that it may be protected from vibration and its cons 'notion thns rendered less costly.

My invention consists, consequently, in the provision of ine-ans tending)` to keep traiiie in a definite traclnf'ay, means rendering` this traclivay particularly durable and, in case of need, easily renewable, and a base beneath the traclivay and separate therefrom, the

Whole road surface being` of Water proof con-V struction.

In the drawings, Fig. 1 shoivs, in cross secm tion, road embodying the principles of the present invention, and

Fig'. 2 shows a top plan vieiv of a short stretch of such road.

Referring to the drawings, Fig. `1 in particular, 10 represents an invisible trackivay comprising', preferably. concrete members rcinforced with longitudinal steel strips 11 and tie members 12. The rails 10 yare of course spaced in arcordamie with standard vehicle gauge, and they have, preferably, a 'flat top snriico. f3 cushioningT layer 13, of sand, mortar. or the like, is spread on the upper snrface of the railslO, and on top of this layer the treadways 141i are laid. These treadivays consist preferably of especially durable blocks, or inserts, which may be of stone, brick, or any similar material, but I do not include in this category concrete blocks, since these are not sufficiently Wear-resistant and do not form a good permanent bond With the asphalt. If concrete blocks were used, the asphalt would soon be drawn away from them, forming` cracks and destroying the Serial NO. 52,800.

haracter of the surface. The in he durable block treadways are plngfgged vri i aiglialt, or the inserts may be lgronted in with cement. In any event, it is important the blocks or inserts form a Water proof-surface.

intermediate the rails 10 is a filling 15 of compacted gravel, crushed stone, or other suitable material, having a definite camber, as shown. rlhis lling, at its edges, extends acont to the low-er edges of the treadivays 1e,l

wat

er proof c U 5 l ,l

and a' layer 16 of compacted rock asphalt covers the lilling, forming a Water proofsurface therefor and a Water proof bond with thetreacvays 141-. either side ofrails l() is .filling 127 ,of compacted road metal covered with a layer 18 of compacted rock asphalt bonding with treadivays 14.

,The a ,phalt layers 16 and 18 may, indeed, meet over the treadvvays 14.-; in such case, however, the layer will soon Wear doWn so that the durable inserts are exposed and take the Wear; When the inserts become badly Worn, they can be easily removed, even one at a time, and replaced by neivV ones. rlhese inserts Will receive nearly all the ivear since the vcan'ibered intermediate secn tion 16 will tend to keep traffic on them. The

fs 10 are shielded in a `great degree from ition stresses by the cushion; and their size may be consideral)lr reduced belov.7 what`V would ordinarily be considered appropriate.

. A road snch as dcserilied can be constructed very economically and will give excellent weer. i are of relatively small ent-cnt, may be readily renewed and small expens ijlaving; thus described my invention I claim: l

, A road confiprisinp,1 a base having' reinforcing traclivaysr wholly submerged therel a relatively thin surface of bitnininonsmaterial. and durable inserts bonded in said surface directly above said traclwavs.

The forefroing specification signed at Temple, Texas, this 29th clay of July., 19

STUART B. MORE.

Again, the wearing surfaces, which I' 

